If the plasticization of the screw barrel is not good, […]
If the plasticization of the screw barrel is not good, the following problems should be paid attention to:
1. Clean the plastic head or replace the plastic head! Remove the head and burn it with fire to completely burn the remaining material on the plastic head;
2. Check carefully, starting from the hopper, the inner spring nozzle;
3. Check whether toner is added to the raw material of the lower screw barrel, whether the temperature is set properly, the barrel of the new machine may have oil, etc.;
4. Whether the pipeline for conveying raw materials is an anti-static hose, or a stainless steel pipeline. When the raw materials are conveyed and rubbed with ordinary PVC hoses, static electricity will be generated, and static electricity will lead to the generation of black spots on the product;
5. Check the dehumidifying dryer of the raw material, the regeneration temperature is very high, and if the quality of the heating tube is not good, black flakes are likely to fall off the outer wall of the heating tube, and then fall into the molecular sieve, and then enter the whole system;
6. Use a special barrel screw, because the PC material is very corrosive, black material will come out once the screw is corrupted.
